19913268 has 24 divisors (see below), whose sum is σ = 46539360. Its totient is φ = 6627040.

The previous prime is 19913233. The next prime is 19913269. The reversal of 19913268 is 86231991.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19913269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10798 + ... + 12506.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^19913268 is an apocalyptic number.

It is an amenable number.

19913268 is an abundant number, since it is smaller than the sum of its proper divisors (26626092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19913268 is a wasteful number, since it uses less digits than its factorization.

19913268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687 (or 2685 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 19913268 is about 4462.4284868219. The cubic root of 19913268 is about 271.0488149788.

The spelling of 19913268 in words is "nineteen million, nine hundred thirteen thousand, two hundred sixty-eight".